what do i do?

my ex bf is a complete sociopth. he ticks EVERY box he has no conscience or remorse what so ever. we have 2 now coming 3 kids together and he has just taken off. he has spent the last 3 years jumping back and forward between me and his ex. and when hes with one or the other his kids get dropped to the side. (they also have 3 kids) i am currently pregnant and he told his ex now gf. he wants fa to do with my baby. and he hasnt seen my other 2 kids in nesrly 3 weeks now. ive changed my number 2 days ago and i refuse to let him have it. he hasnt tried to make contact. what wpuld ypu ladies do. he dosent care about his kids. my daufhter was in hospital on tuesday and i told him and he didnt even ask how she was. he just went on about himself and how he crashed his car. pitty it didnt kill him for the shit hes put me ans my kids threw ffs. he wanted my unborn baby dead just so his girl wouldnt leave him. so instead told her he will have notbing to do with it. sick ans twisted he is.